diff --git a/ChangeLog.md b/ChangeLog.md
index 445ed16d..54920061 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -6,6 +6,7 @@
   * Add effective total shield value to defence summary
   * Fix issue where new module added to a slot did not reset its enabled status
   * Show integrity value for relevant modules
+  * Reset old modification values when a new roll is applied
 
 #2.2.19
   * Power management panel now displays modules in descending order of power usage by default
diff --git a/src/app/components/ModificationsMenu.jsx b/src/app/components/ModificationsMenu.jsx
index 0b25479b..ee961d29 100644
--- a/src/app/components/ModificationsMenu.jsx
+++ b/src/app/components/ModificationsMenu.jsx
@@ -174,6 +174,7 @@ export default class ModificationsMenu extends TranslatedComponent {
    */
   _rollWorst() {
     const { m, ship } = this.props;
+    ship.clearModifications(m);
     const features = m.blueprint.grades[m.blueprint.grade].features;
     for (const featureName in features) {
       let value = features[featureName][0];
@@ -188,6 +189,7 @@ export default class ModificationsMenu extends TranslatedComponent {
    */
   _rollRandom() {
     const { m, ship } = this.props;
+    ship.clearModifications(m);
     const features = m.blueprint.grades[m.blueprint.grade].features;
     for (const featureName in features) {
       let value = features[featureName][0] + (Math.random() * (features[featureName][1] - features[featureName][0]));
@@ -216,6 +218,7 @@ export default class ModificationsMenu extends TranslatedComponent {
    */
   _rollExtreme() {
     const { m, ship } = this.props;
+    ship.clearModifications(m);
     const features = m.blueprint.grades[m.blueprint.grade].features;
     for (const featureName in features) {
       let value;